Alert archive / Indiana / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 46, NWS Indianapolis, IN

April 9, 2011Knox County, Sullivan County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Apr 9, 2011, 8:00 AM EDT for Knox County, Sullivan County, Indiana. It was in force for 45 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 9, 2011, 8:00 AM EDT (12:00 UTC)
Expired: Apr 9, 2011, 8:45 AM EDT
In force: 45 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Knox County, IN, Sullivan County, IN

The radar

The Evansville,IN radar (KVWX), 67 km from the middle of the area, began a volume at 12:02 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Apr 9, 8:31 AM EDT	HAIL 1	Oaktown, IN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 0.0 hours before the alert went out and 184 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1370 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

460 
WUUS53 KIND 091200
SVRIND
INC083-153-091245-
/O.NEW.KIND.SV.W.0046.110409T1200Z-110409T1245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
800 AM EDT SAT APR 9 2011

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN KNOX COUNTY IN SOUTHWEST INDIANA...
  SOUTHERN SULLIVAN COUNTY IN SOUTHWEST INDIANA...

* UNTIL 845 AM EDT

* AT 756 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  BRIDGEPORT...OR NEAR LAWRENCEVILLE...AND MOVING NORTHEAST AT 35
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  VINCENNES UNIVERSITY AND VINCENNES AROUND 815 AM EDT...
  BRUCEVILLE AROUND 825 AM EDT...
  OAKTOWN AND WHEATLAND AROUND 830 AM EDT...
  BICKNELL AROUND 835 AM EDT...
  FREELANDVILLE AND CARLISLE AROUND 840 AM EDT...
  EDWARDSPORT AND SANDBORN AROUND 845 AM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 3869 8755 3874 8751 3879 8751 3886 8756
      3893 8754 3899 8755 3893 8725 3891 8725
      3890 8713 3884 8717 3885 8719 3881 8721
      3881 8725 3877 8727 3874 8725 3873 8727
      3866 8728 3861 8763 3864 8763
TIME...MOT...LOC 1200Z 244DEG 30KT 3870 8769
WIND...HAIL 60MPH 1.00IN

$$

PUMA

3 follow-up statements

020 
WWUS53 KIND 091212
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
812 AM EDT SAT APR 9 2011

INC083-153-091245-
/O.CON.KIND.SV.W.0046.000000T0000Z-110409T1245Z/
KNOX-SULLIVAN-
812 AM EDT SAT APR 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
KNOX AND SOUTHERN SULLIVAN COUNTIES UNTIL 845 AM EDT...

AT 812 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
SOUTHWEST OF RUSSELLVILLE...OR 6 MILES EAST OF LAWRENCEVILLE...MOVING
NORTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  BRUCEVILLE AROUND 825 AM EDT...
  OAKTOWN AND BICKNELL AROUND 835 AM EDT...
  FREELANDVILLE AND EDWARDSPORT AROUND 845 AM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 3893 8754 3899 8755 3893 8725 3891 8725
      3890 8713 3884 8717 3885 8719 3881 8721
      3881 8725 3877 8727 3873 8738 3869 8754
      3874 8751 3879 8751 3887 8756
TIME...MOT...LOC 1213Z 236DEG 28KT 3876 8758
WIND...HAIL 60MPH 1.00IN

$$

PUMA

767 
WWUS53 KIND 091227
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
827 AM EDT SAT APR 9 2011

INC083-153-091245-
/O.CON.KIND.SV.W.0046.000000T0000Z-110409T1245Z/
KNOX-SULLIVAN-
827 AM EDT SAT APR 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
KNOX AND SOUTHERN SULLIVAN COUNTIES UNTIL 845 AM EDT...

AT 823 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
RUSSELLVILLE...OR 13 MILES NORTH OF VINCENNES...MOVING NORTHEAST AT
40 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  FREELANDVILLE AROUND 835 AM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

&&

LAT...LON 3893 8754 3896 8754 3897 8755 3899 8755
      3893 8725 3891 8725 3890 8713 3884 8717
      3885 8719 3879 8751 3887 8756
TIME...MOT...LOC 1227Z 233DEG 34KT 3889 8745
WIND...HAIL 60MPH 1.00IN

$$

PUMA

012 
WWUS53 KIND 091245
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
845 AM EDT SAT APR 9 2011

INC083-153-091254-
/O.EXP.KIND.SV.W.0046.000000T0000Z-110409T1245Z/
KNOX-SULLIVAN-
845 AM EDT SAT APR 9 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN KNOX AND SOUTHERN
SULLIVAN COUNTIES WILL EXPIRE AT 845 AM EDT/745 AM CDT/...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

LAT...LON 3893 8754 3896 8754 3897 8755 3899 8755
      3893 8725 3891 8725 3890 8713 3884 8717
      3885 8719 3879 8751 3887 8756
TIME...MOT...LOC 1244Z 233DEG 34KT 3898 8728

$$

PUMA

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 9, 8:27 AM EDT	Severe Thunderstorm Warning	IND	Clay, Greene, Sullivan, Vigo	48 min
Apr 9, 9:03 AM EDT	Severe Thunderstorm Warning	IND	Greene, Knox, Sullivan	27 min
Apr 9, 9:06 AM EDT	Severe Thunderstorm Warning	IND	Daviess, Knox, Sullivan	39 min
Apr 9, 9:09 AM EDT	Severe Thunderstorm Warning	IND	Clay, Owen, Putnam, Vigo	51 min
Apr 9, 9:22 AM EDT	Severe Thunderstorm Warning	IND	Greene, Monroe, Owen	38 min
Apr 9, 9:31 AM EDT	Severe Thunderstorm Warning	IND	Daviess, Greene, Knox, Sullivan	44 min
Apr 9, 9:47 AM EDT	Flash Flood Warning	IND	Greene, Owen, Sullivan, Vigo	5 hr
Apr 9, 10:10 AM EDT	Flash Flood Warning	IND	Brown, Daviess, Lawrence, Martin, Monroe	4 hr
Apr 9, 10:21 AM EDT	Severe Thunderstorm Warning	IND	Jackson, Lawrence	39 min
Apr 9, 12:00 PM EDT	River Flood Warning	IND	Lawrence, Martin	8 days
Apr 9, 12:00 PM EDT	River Flood Warning	IND	Daviess, Gibson, Knox, Pike	37 days

Nearby

Severe Thunderstorm Warnings in Indiana, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.